McDonald's has a company-wide sexual harassment policy but the protestors - who are backed by the Time's Up Legal Defense Fund - want to see improvements.

They say procedures for responding to harassment complaints are inadequate and that all staff should undergo anti-harassment training.

Complaints ignored

Since 2016, more than two dozen McDonald's workers have filed complaints with the US National Labor Relations Board, alleging their reports of harassment were ignored, mocked or met with retaliation.

The complaints named both McDonald's franchisees and the company itself. However, the firm regards its franchisees as independent business owners.

In one example, Breauna Morrow, a 15-year-old cashier in St Louis, said that she had been "repeatedly harassed" by a co-worker using "graphic, sexual language".

However, when she reported the incident her "supervisors did nothing".

In another incident, an employee said she had reported being groped by a co-worker at a New Orleans outlet.

Instead of taking action, her managers mocked the woman and said "she was probably giving the worker 'sex appeal'".

'Policies in place'

McDonald's spokeswoman Andrea Abate said: "We have policies, procedures and training in place that are specifically designed to prevent sexual harassment at our company and company-owned restaurants, and we firmly believe that our franchisees share this commitment."

McDonald's also continues to face pressure from labour unions over the wages it pays it staff.

The Fight for $15, a national movement seeking to increase the minimum wage, has been pressurising the chain to increase wages and improve working conditions. The campaign also helped to organise Tuesday's protest.